docs: Replaced licence (now the code is GPL 3.0), author list, and updated installation instructions

Change-Id: Ieea063c7c4c5e1f08b8c8eb557493f78dfc0941e
tools: Update code to use unified NFD Management Protocol

Change-Id: I0e638f189afa87431292ca9471d95cba02ccd831
Refs: #1418